[blktrace.git] / blkparse.c

/*
 * block queue tracing parse application
 *
 * Copyright (C) 2005 Jens Axboe <axboe@suse.de>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <errno.h>
#include <signal.h>

#include "blktrace.h"
#include "rbtree.h"

#define MAX_CPUS	(512)

#define SECONDS(x) 	((unsigned long long)(x) / 1000000000)
#define NANO_SECONDS(x)	((unsigned long long)(x) % 1000000000)

static int backwards;
static unsigned long long genesis_time, last_reported_time;

struct per_cpu_info {
	int cpu;
	int nelems;

	int fd;
	char fname[128];

	FILE *ofp;
	char ofname[128];

	unsigned long qreads, qwrites, creads, cwrites, mreads, mwrites;
	unsigned long ireads, iwrites;
	unsigned long long qread_kb, qwrite_kb, cread_kb, cwrite_kb;
	unsigned long long iread_kb, iwrite_kb;
};

#define S_OPTS	"i:o:"
static struct option l_opts[] = {
	{
		.name = "input",
		.has_arg = 1,
		.flag = NULL,
		.val = 'i'
	},
	{
		.name = "output",
		.has_arg = 1,
		.flag = NULL,
		.val = 'o'
	},
	{
		.name = NULL,
		.has_arg = 0,
		.flag = NULL,
		.val = 0
	}
};

static struct rb_root rb_root;

struct trace {
	struct blk_io_trace *bit;
	struct rb_node rb_node;
};

static struct per_cpu_info per_cpu_info[MAX_CPUS];

static unsigned long long events;

static int max_cpus;

static char *dev, *output_name;

#define is_done()	(*(volatile int *)(&done))
static volatile int done;

static inline void check_time(struct blk_io_trace *bit)
{
	unsigned long long this = bit->time;
	unsigned long long last = last_reported_time;

	backwards = (this < last) ? 'B' : ' ';
	last_reported_time = this;
}

static inline void account_m(struct per_cpu_info *pci, int rw,
			     unsigned int bytes)
{
	if (rw) {
		pci->mwrites++;
		pci->qwrite_kb += bytes >> 10;
	} else {
		pci->mreads++;
		pci->qread_kb += bytes >> 10;
	}
}

static inline void account_q(struct per_cpu_info *pci, int rw,
			     unsigned int bytes)
{
	if (rw) {
		pci->qwrites++;
		pci->qwrite_kb += bytes >> 10;
	} else {
		pci->qreads++;
		pci->qread_kb += bytes >> 10;
	}
}

static inline void account_c(struct per_cpu_info *pci, int rw,
			     unsigned int bytes)
{
	if (rw) {
		pci->cwrites++;
		pci->cwrite_kb += bytes >> 10;
	} else {
		pci->creads++;
		pci->cread_kb += bytes >> 10;
	}
}

static inline void account_i(struct per_cpu_info *pci, int rw,
			     unsigned int bytes)
{
	if (rw) {
		pci->iwrites++;
		pci->iwrite_kb += bytes >> 10;
	} else {
		pci->ireads++;
		pci->iread_kb += bytes >> 10;
	}
}

static void output(struct per_cpu_info *pci, char *s)
{
	printf("%s", s);

	if (pci->ofp)
		fprintf(pci->ofp, "%s", s);
}

static char hstring[256];
static char tstring[256];

static inline char *setup_header(struct per_cpu_info *pci,
				 struct blk_io_trace *t, char act)
{
	int w = t->action & BLK_TC_ACT(BLK_TC_WRITE);
	int b = t->action & BLK_TC_ACT(BLK_TC_BARRIER);
	int s = t->action & BLK_TC_ACT(BLK_TC_SYNC);
	char rwbs[4];
	int i = 0;

	if (w)
		rwbs[i++] = 'W';
	else
		rwbs[i++] = 'R';
	if (b)
		rwbs[i++] = 'B';
	if (s)
		rwbs[i++] = 'S';

	rwbs[i] = '\0';

	sprintf(hstring, "%c %3d %15ld %5Lu.%09Lu %5u %c %3s", backwards,
		pci->cpu,
		(unsigned long)t->sequence, SECONDS(t->time), 
		NANO_SECONDS(t->time), t->pid, act, rwbs);

	return hstring;
}

static void log_complete(struct per_cpu_info *pci, struct blk_io_trace *t,
			 char act)
{
	sprintf(tstring,"%s %Lu + %u [%d]\n", setup_header(pci, t, act),
		(unsigned long long)t->sector, t->bytes >> 9, t->error);
	output(pci, tstring);
}

static void log_queue(struct per_cpu_info *pci, struct blk_io_trace *t,
		      char act)
{
	sprintf(tstring,"%s %Lu + %u\n", setup_header(pci, t, act),
		(unsigned long long)t->sector, t->bytes >> 9);
	output(pci, tstring);
}

static void log_issue(struct per_cpu_info *pci, struct blk_io_trace *t,
		      char act)
{
	sprintf(tstring,"%s %Lu + %u\n", setup_header(pci, t, act),
		(unsigned long long)t->sector, t->bytes >> 9);
	output(pci, tstring);
}

static void log_merge(struct per_cpu_info *pci, struct blk_io_trace *t,
		      char act)
{
	sprintf(tstring,"%s   %Lu + %u\n", setup_header(pci, t, act),
		(unsigned long long)t->sector, t->bytes >> 9);
	output(pci, tstring);
}

static void log_generic(struct per_cpu_info *pci, struct blk_io_trace *t,
			char act)
{
	sprintf(tstring,"%s %Lu + %u\n", setup_header(pci, t, act),
		(unsigned long long)t->sector, t->bytes >> 9);
	output(pci, tstring);
}

static int log_pc(struct per_cpu_info *pci, struct blk_io_trace *t, char act)
{
	unsigned char *buf;
	int i;

	sprintf(tstring,"%s ", setup_header(pci, t, act));
	output(pci, tstring);

	buf = (unsigned char *) t + sizeof(*t);
	for (i = 0; i < t->pdu_len; i++) {
		sprintf(tstring,"%02x ", buf[i]);
		output(pci, tstring);
	}

	if (act == 'C') {
		sprintf(tstring,"[%d]", t->error);
		output(pci, tstring);
	}

	printf("\n");
	return 0;
}

static int dump_trace_pc(struct blk_io_trace *t, struct per_cpu_info *pci)
{
	int ret = 0;

	switch (t->action & 0xffff) {
		case __BLK_TA_QUEUE:
			log_generic(pci, t, 'Q');
			break;
		case __BLK_TA_GETRQ:
			log_generic(pci, t, 'G');
			break;
		case __BLK_TA_SLEEPRQ:
			log_generic(pci, t, 'S');
			break;
		case __BLK_TA_REQUEUE:
			log_generic(pci, t, 'R');
			break;
		case __BLK_TA_ISSUE:
			ret = log_pc(pci, t, 'D');
			break;
		case __BLK_TA_COMPLETE:
			log_pc(pci, t, 'C');
			break;
		default:
			fprintf(stderr, "Bad pc action %x\n", t->action);
			ret = 1;
			break;
	}
	
	return ret;
}

static void dump_trace_fs(struct blk_io_trace *t, struct per_cpu_info *pci)
{
	int w = t->action & BLK_TC_ACT(BLK_TC_WRITE);

	switch (t->action & 0xffff) {
		case __BLK_TA_QUEUE:
			account_q(pci, w, t->bytes);
			log_queue(pci, t, 'Q');
			break;
		case __BLK_TA_BACKMERGE:
			account_m(pci, w, t->bytes);
			log_merge(pci, t, 'M');
			break;
		case __BLK_TA_FRONTMERGE:
			account_m(pci, w, t->bytes);
			log_merge(pci, t, 'F');
			break;
		case __BLK_TA_GETRQ:
			log_generic(pci, t, 'G');
			break;
		case __BLK_TA_SLEEPRQ:
			log_generic(pci, t, 'S');
			break;
		case __BLK_TA_REQUEUE:
			account_c(pci, w, -t->bytes);
			log_queue(pci, t, 'R');
			break;
		case __BLK_TA_ISSUE:
			account_i(pci, w, t->bytes);
			log_issue(pci, t, 'D');
			break;
		case __BLK_TA_COMPLETE:
			account_c(pci, w, t->bytes);
			log_complete(pci, t, 'C');
			break;
		default:
			fprintf(stderr, "Bad fs action %x\n", t->action);
			break;
	}
}

static int dump_trace(struct blk_io_trace *t, struct per_cpu_info *pci)
{
	int ret = 0;

	if (output_name && !pci->ofp) {
		snprintf(pci->ofname, sizeof(pci->ofname) - 1,
				"%s_log.%d", output_name, pci->cpu);

		pci->ofp = fopen(pci->ofname, "w");
		if (pci->ofp == NULL) {
			perror(pci->ofname);
			return 1;
		}
	}

	if (t->action & BLK_TC_ACT(BLK_TC_PC))
		ret = dump_trace_pc(t, pci);
	else
		dump_trace_fs(t, pci);

	events++;
	return ret;
}

static void dump_pci_stats(struct per_cpu_info *pci)
{
	printf("\tReads:\n");
	printf("\t\tQueued:    %'8lu, %'8LuKiB\n", pci->qreads, pci->qread_kb);
	printf("\t\tDispatched %'8lu, %'8LuKiB\n", pci->ireads, pci->iread_kb);
	printf("\t\tCompleted: %'8lu, %'8LuKiB\n", pci->creads, pci->cread_kb);
	printf("\t\tMerges:    %'8lu\n", pci->mreads);

	printf("\tWrites:\n");
	printf("\t\tQueued:    %'8lu, %'8LuKiB\n", pci->qwrites,pci->qwrite_kb);
	printf("\t\tDispatched %'8lu, %'8LuKiB\n", pci->iwrites,pci->iwrite_kb);
	printf("\t\tCompleted: %'8lu, %'8LuKiB\n", pci->cwrites,pci->cwrite_kb);
	printf("\t\tMerges:    %'8lu\n", pci->mwrites);
}

static void show_stats(void)
{
	struct per_cpu_info foo, *pci;
	int i, pci_events = 0;

	memset(&foo, 0, sizeof(foo));

	for (i = 0; i < MAX_CPUS; i++) {
		pci = &per_cpu_info[i];

		if (!pci->nelems)
			continue;

		foo.qreads += pci->qreads;
		foo.qwrites += pci->qwrites;
		foo.creads += pci->creads;
		foo.cwrites += pci->cwrites;
		foo.mreads += pci->mreads;
		foo.mwrites += pci->mwrites;
		foo.qread_kb += pci->qread_kb;
		foo.qwrite_kb += pci->qwrite_kb;
		foo.cread_kb += pci->cread_kb;
		foo.cwrite_kb += pci->cwrite_kb;

		printf("CPU%d:\n", i);
		dump_pci_stats(pci);
		pci_events++;
	}

	if (pci_events > 1) {
		printf("Total:\n");
		dump_pci_stats(&foo);
	}

	printf("Events: %'Lu\n", events);
}

static inline int trace_rb_insert(struct trace *t)
{
	struct rb_node **p = &rb_root.rb_node;
	struct rb_node *parent = NULL;
	struct trace *__t;

	while (*p) {
		parent = *p;
		__t = rb_entry(parent, struct trace, rb_node);

		if (t->bit->sequence < __t->bit->sequence)
			p = &(*p)->rb_left;
		else if (t->bit->sequence > __t->bit->sequence)
			p = &(*p)->rb_right;
		else {
			fprintf(stderr, "sequence alias!\n");
			return 1;
		}
	}

	rb_link_node(&t->rb_node, parent, p);
	rb_insert_color(&t->rb_node, &rb_root);
	return 0;
}

static int sort_entries(void *traces, unsigned long offset, int nr)
{
	struct per_cpu_info *pci;
	struct blk_io_trace *bit;
	struct trace *t;
	void *start = traces;
	int nelems = 0;

	while (traces - start <= offset - sizeof(*bit)) {
		if (!nr)
			break;

		bit = traces;

		t = malloc(sizeof(*t));
		t->bit = bit;
		memset(&t->rb_node, 0, sizeof(t->rb_node));

		trace_to_cpu(bit);

		if (verify_trace(bit))
			break;

		pci = &per_cpu_info[bit->cpu];

		pci->nelems++;

		if (trace_rb_insert(t))
			return -1;

		traces += sizeof(*bit) + bit->pdu_len;
		nelems++;
		nr--;
	}

	return nelems;
}

static void free_entries_rb(void)
{
	struct rb_node *n;

	while ((n = rb_first(&rb_root)) != NULL) {
		struct trace *t = rb_entry(n, struct trace, rb_node);

		rb_erase(&t->rb_node, &rb_root);
		free(t);
	}
}

static void show_entries_rb(void)
{
	struct blk_io_trace *bit;
	struct rb_node *n;
	struct trace *t;
	int cpu;

	n = rb_first(&rb_root);
	if (!n)
		return;

	do {
		t = rb_entry(n, struct trace, rb_node);
		bit = t->bit;

		cpu = bit->cpu;
		if (cpu > max_cpus) {
			fprintf(stderr, "CPU number too large (%d)\n", cpu);
			break;
		}

		if (genesis_time == 0)
			genesis_time = bit->time;
		bit->time -= genesis_time;

		check_time(bit);

		if (dump_trace(bit, &per_cpu_info[cpu]))
			break;

	} while ((n = rb_next(n)) != NULL);
}

static int read_data(int fd, void *buffer, int bytes, int block)
{
	int ret, bytes_left, fl;
	void *p;

	fl = fcntl(fd, F_GETFL);

	if (!block)
		fcntl(fd, F_SETFL, fl | O_NONBLOCK);
	else
		fcntl(fd, F_SETFL, fl & ~O_NONBLOCK);

	bytes_left = bytes;
	p = buffer;
	while (bytes_left > 0) {
		ret = read(fd, p, bytes_left);
		if (!ret)
			return 1;
		else if (ret < 0) {
			if (errno != EAGAIN)
				perror("read");
			return -1;
		} else {
			p += ret;
			bytes_left -= ret;
		}
	}

	return 0;
}

static int do_file(void)
{
	int i, ret, nfiles;

	nfiles = 0;
	max_cpus = 0;
	for (i = 0; i < MAX_CPUS; i++, nfiles++, max_cpus++) {
		struct per_cpu_info *pci = &per_cpu_info[i];
		struct stat st;
		void *tb;

		pci->cpu = i;
		pci->ofp = NULL;

		snprintf(pci->fname, sizeof(pci->fname)-1,"%s_out.%d", dev, i);
		if (stat(pci->fname, &st) < 0)
			break;
		if (!st.st_size)
			continue;

		printf("Processing %s\n", pci->fname);

		tb = malloc(st.st_size);

		pci->fd = open(pci->fname, O_RDONLY);
		if (pci->fd < 0) {
			perror(pci->fname);
			break;
		}

		if (read_data(pci->fd, tb, st.st_size, 1))
			break;

		ret = sort_entries(tb, st.st_size, ~0U);
		if (ret == -1)
			break;

		close(pci->fd);
		printf("\t%2d %10s %15d\n", i, pci->fname, pci->nelems);

	}

	if (!nfiles) {
		fprintf(stderr, "No files found\n");
		return 1;
	}

	show_entries_rb();
	return 0;
}

static void resize_buffer(void **buffer, long *old_size)
{
	long cur_size = *old_size;
	void *ptr;

	*old_size *= 2;
	ptr = malloc(*old_size);
	memcpy(ptr, *buffer, cur_size);
	free(*buffer);
	*buffer = ptr;
}

static int read_sort_events(int fd, void **buffer)
{
	long offset, max_offset;
	int events;

	max_offset = 128 * sizeof(struct blk_io_trace);
	*buffer = malloc(max_offset);
	events = 0;
	offset = 0;

	do {
		struct blk_io_trace *t;
		int pdu_len;

		if (max_offset - offset < sizeof(*t))
			resize_buffer(buffer, &max_offset);

		if (read_data(fd, *buffer + offset, sizeof(*t), !events)) {
			if (events)
				break;

			usleep(1000);
			continue;
		}

		t = *buffer + offset;
		offset += sizeof(*t);

		pdu_len = be16_to_cpu(t->pdu_len);

		if (max_offset - offset < pdu_len)
			resize_buffer(buffer, &max_offset);

		if (read_data(fd, *buffer + offset, pdu_len, 1))
			break;

		offset += pdu_len;
		events++;
	} while (!is_done());

	return events;
}

static int do_stdin(void)
{
	int fd;
	void *ptr;

	fd = dup(STDIN_FILENO);
	do {
		int events;

		events = read_sort_events(fd, &ptr);
		if (!events)
			break;
	
		sort_entries(ptr, ~0UL, events);
		show_entries_rb();
		free_entries_rb();
	} while (1);

	close(fd);
	free(ptr);
	return 0;
}

static void flush_output(void)
{
	int i;

	for (i = 0; i < MAX_CPUS; i++) {
		struct per_cpu_info *pci = &per_cpu_info[i];

		if (pci->ofp) {
			fflush(pci->ofp);
			fclose(pci->ofp);
			pci->ofp = NULL;
		}
	}
}

static void handle_sigint(int sig)
{
	done = 1;
	flush_output();
}

static void usage(char *prog)
{
	fprintf(stderr, "Usage: %s -i <name> [-o <output>]\n", prog);
}

int main(int argc, char *argv[])
{
	int c, ret;

	while ((c = getopt_long(argc, argv, S_OPTS, l_opts, NULL)) != -1) {
		switch (c) {
		case 'i':
			dev = strdup(optarg);
			break;
		case 'o':
			output_name = strdup(optarg);
			break;
		default:
			usage(argv[0]);
			return 1;
		}
	}

	if (!dev) {
		usage(argv[0]);
		return 1;
	}

	memset(per_cpu_info, 0, sizeof(per_cpu_info));
	memset(&rb_root, 0, sizeof(rb_root));

	signal(SIGINT, handle_sigint);
	signal(SIGHUP, handle_sigint);
	signal(SIGTERM, handle_sigint);

	if (!strcmp(dev, "-"))
		ret = do_stdin();
	else
		ret = do_file();

	show_stats();
	flush_output();
	return ret;
}
Commit	Line	Data
d956a2cd JA	1	/*
	2	* block queue tracing parse application
	3	*
	4	* Copyright (C) 2005 Jens Axboe <axboe@suse.de>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*
	20	*/
d0ca268b JA	21	#include <sys/types.h>
	22	#include <sys/stat.h>
	23	#include <unistd.h>
	24	#include <stdio.h>
	25	#include <fcntl.h>
	26	#include <stdlib.h>
8fc0abbc	27	#include <string.h>
d5396421	28	#include <getopt.h>
412819ce JA	29	#include <errno.h>
412819ce JA	30	#include <signal.h>
d0ca268b	31
8fc0abbc JA	32	#include "blktrace.h"
8fc0abbc JA	33	#include "rbtree.h"
d0ca268b	34
fd92da24	35	#define MAX_CPUS (512)
d0ca268b	36
cfab07eb AB	37	#define SECONDS(x) ((unsigned long long)(x) / 1000000000)
	38	#define NANO_SECONDS(x) ((unsigned long long)(x) % 1000000000)
	39
d5396421 JA	40	static int backwards;
	41	static unsigned long long genesis_time, last_reported_time;
	42
	43	struct per_cpu_info {
d0ca268b JA	44	int cpu;
d0ca268b JA	45	int nelems;
d0ca268b JA	46
d0ca268b JA	47	int fd;
87b72777	48	char fname[128];
d0ca268b	49
87b72777 JA	50	FILE *ofp;
87b72777 JA	51	char ofname[128];
8fc0abbc	52
5c017e4b	53	unsigned long qreads, qwrites, creads, cwrites, mreads, mwrites;
afd2d7ad	54	unsigned long ireads, iwrites;
5c017e4b	55	unsigned long long qread_kb, qwrite_kb, cread_kb, cwrite_kb;
afd2d7ad	56	unsigned long long iread_kb, iwrite_kb;
d0ca268b JA	57	};
d0ca268b JA	58
d5396421 JA	59	#define S_OPTS "i:o:"
	60	static struct option l_opts[] = {
	61	{
	62	.name = "input",
	63	.has_arg = 1,
	64	.flag = NULL,
	65	.val = 'i'
	66	},
	67	{
	68	.name = "output",
	69	.has_arg = 1,
	70	.flag = NULL,
	71	.val = 'o'
	72	},
	73	{
	74	.name = NULL,
	75	.has_arg = 0,
	76	.flag = NULL,
	77	.val = 0
	78	}
	79	};
	80
8fc0abbc JA	81	static struct rb_root rb_root;
	82
	83	struct trace {
	84	struct blk_io_trace *bit;
	85	struct rb_node rb_node;
	86	};
	87
d5396421	88	static struct per_cpu_info per_cpu_info[MAX_CPUS];
d0ca268b	89
87b72777 JA	90	static unsigned long long events;
	91
	92	static int max_cpus;
d5396421 JA	93
d5396421 JA	94	static char dev, output_name;
d0ca268b	95
412819ce JA	96	#define is_done() ((volatile int )(&done))
	97	static volatile int done;
	98
cfab07eb AB	99	static inline void check_time(struct blk_io_trace *bit)
	100	{
	101	unsigned long long this = bit->time;
	102	unsigned long long last = last_reported_time;
	103
	104	backwards = (this < last) ? 'B' : ' ';
	105	last_reported_time = this;
	106	}
	107
d5396421	108	static inline void account_m(struct per_cpu_info *pci, int rw,
5c017e4b	109	unsigned int bytes)
d0ca268b JA	110	{
d0ca268b JA	111	if (rw) {
d5396421 JA	112	pci->mwrites++;
d5396421 JA	113	pci->qwrite_kb += bytes >> 10;
d0ca268b	114	} else {
d5396421 JA	115	pci->mreads++;
d5396421 JA	116	pci->qread_kb += bytes >> 10;
d0ca268b JA	117	}
	118	}
	119
d5396421	120	static inline void account_q(struct per_cpu_info *pci, int rw,
5c017e4b	121	unsigned int bytes)
d0ca268b JA	122	{
d0ca268b JA	123	if (rw) {
d5396421 JA	124	pci->qwrites++;
d5396421 JA	125	pci->qwrite_kb += bytes >> 10;
d0ca268b	126	} else {
d5396421 JA	127	pci->qreads++;
d5396421 JA	128	pci->qread_kb += bytes >> 10;
d0ca268b JA	129	}
	130	}
	131
d5396421	132	static inline void account_c(struct per_cpu_info *pci, int rw,
5c017e4b	133	unsigned int bytes)
d0ca268b JA	134	{
d0ca268b JA	135	if (rw) {
d5396421 JA	136	pci->cwrites++;
d5396421 JA	137	pci->cwrite_kb += bytes >> 10;
d0ca268b	138	} else {
d5396421 JA	139	pci->creads++;
d5396421 JA	140	pci->cread_kb += bytes >> 10;
d0ca268b JA	141	}
	142	}
	143
d5396421	144	static inline void account_i(struct per_cpu_info *pci, int rw,
afd2d7ad	145	unsigned int bytes)
	146	{
	147	if (rw) {
d5396421 JA	148	pci->iwrites++;
d5396421 JA	149	pci->iwrite_kb += bytes >> 10;
afd2d7ad	150	} else {
d5396421 JA	151	pci->ireads++;
d5396421 JA	152	pci->iread_kb += bytes >> 10;
afd2d7ad	153	}
	154	}
	155
d5396421	156	static void output(struct per_cpu_info pci, char s)
d0ca268b JA	157	{
d0ca268b JA	158	printf("%s", s);
d5396421 JA	159
d5396421 JA	160	if (pci->ofp)
33b56019	161	fprintf(pci->ofp, "%s", s);
d0ca268b JA	162	}
d0ca268b JA	163
3aabcd89 JA	164	static char hstring[256];
3aabcd89 JA	165	static char tstring[256];
d0ca268b	166
d5396421 JA	167	static inline char setup_header(struct per_cpu_info pci,
d5396421 JA	168	struct blk_io_trace *t, char act)
d0ca268b JA	169	{
	170	int w = t->action & BLK_TC_ACT(BLK_TC_WRITE);
	171	int b = t->action & BLK_TC_ACT(BLK_TC_BARRIER);
	172	int s = t->action & BLK_TC_ACT(BLK_TC_SYNC);
	173	char rwbs[4];
	174	int i = 0;
	175
	176	if (w)
	177	rwbs[i++] = 'W';
	178	else
	179	rwbs[i++] = 'R';
	180	if (b)
	181	rwbs[i++] = 'B';
	182	if (s)
	183	rwbs[i++] = 'S';
	184
	185	rwbs[i] = '\0';
	186
cfab07eb	187	sprintf(hstring, "%c %3d %15ld %5Lu.%09Lu %5u %c %3s", backwards,
d5396421	188	pci->cpu,
cfab07eb AB	189	(unsigned long)t->sequence, SECONDS(t->time),
cfab07eb AB	190	NANO_SECONDS(t->time), t->pid, act, rwbs);
d0ca268b JA	191
	192	return hstring;
	193	}
	194
d5396421 JA	195	static void log_complete(struct per_cpu_info pci, struct blk_io_trace t,
d5396421 JA	196	char act)
d0ca268b	197	{
d5396421	198	sprintf(tstring,"%s %Lu + %u [%d]\n", setup_header(pci, t, act),
d0ca268b	199	(unsigned long long)t->sector, t->bytes >> 9, t->error);
d5396421	200	output(pci, tstring);
d0ca268b JA	201	}
d0ca268b JA	202
d5396421 JA	203	static void log_queue(struct per_cpu_info pci, struct blk_io_trace t,
d5396421 JA	204	char act)
d0ca268b	205	{
d5396421	206	sprintf(tstring,"%s %Lu + %u\n", setup_header(pci, t, act),
d0ca268b	207	(unsigned long long)t->sector, t->bytes >> 9);
d5396421	208	output(pci, tstring);
d0ca268b JA	209	}
d0ca268b JA	210
d5396421 JA	211	static void log_issue(struct per_cpu_info pci, struct blk_io_trace t,
d5396421 JA	212	char act)
d0ca268b	213	{
d5396421	214	sprintf(tstring,"%s %Lu + %u\n", setup_header(pci, t, act),
d0ca268b	215	(unsigned long long)t->sector, t->bytes >> 9);
d5396421	216	output(pci, tstring);
d0ca268b JA	217	}
d0ca268b JA	218
d5396421 JA	219	static void log_merge(struct per_cpu_info pci, struct blk_io_trace t,
d5396421 JA	220	char act)
d0ca268b	221	{
d5396421	222	sprintf(tstring,"%s %Lu + %u\n", setup_header(pci, t, act),
d0ca268b	223	(unsigned long long)t->sector, t->bytes >> 9);
d5396421	224	output(pci, tstring);
d0ca268b JA	225	}
d0ca268b JA	226
d5396421 JA	227	static void log_generic(struct per_cpu_info pci, struct blk_io_trace t,
d5396421 JA	228	char act)
d0ca268b	229	{
d5396421	230	sprintf(tstring,"%s %Lu + %u\n", setup_header(pci, t, act),
d0ca268b	231	(unsigned long long)t->sector, t->bytes >> 9);
d5396421	232	output(pci, tstring);
d0ca268b JA	233	}
d0ca268b JA	234
d5396421	235	static int log_pc(struct per_cpu_info pci, struct blk_io_trace t, char act)
d0ca268b	236	{
87b72777 JA	237	unsigned char *buf;
87b72777 JA	238	int i;
d0ca268b	239
d5396421 JA	240	sprintf(tstring,"%s ", setup_header(pci, t, act));
d5396421 JA	241	output(pci, tstring);
d0ca268b	242
87b72777	243	buf = (unsigned char ) t + sizeof(t);
d0ca268b JA	244	for (i = 0; i < t->pdu_len; i++) {
d0ca268b JA	245	sprintf(tstring,"%02x ", buf[i]);
d5396421	246	output(pci, tstring);
d0ca268b JA	247	}
	248
	249	if (act == 'C') {
	250	sprintf(tstring,"[%d]", t->error);
d5396421	251	output(pci, tstring);
d0ca268b JA	252	}
	253
	254	printf("\n");
87b72777	255	return 0;
d0ca268b JA	256	}
d0ca268b JA	257
d5396421	258	static int dump_trace_pc(struct blk_io_trace t, struct per_cpu_info pci)
d0ca268b	259	{
87b72777 JA	260	int ret = 0;
87b72777 JA	261
d0ca268b JA	262	switch (t->action & 0xffff) {
d0ca268b JA	263	case __BLK_TA_QUEUE:
d5396421	264	log_generic(pci, t, 'Q');
d0ca268b JA	265	break;
d0ca268b JA	266	case __BLK_TA_GETRQ:
d5396421	267	log_generic(pci, t, 'G');
d0ca268b JA	268	break;
d0ca268b JA	269	case __BLK_TA_SLEEPRQ:
d5396421	270	log_generic(pci, t, 'S');
d0ca268b JA	271	break;
d0ca268b JA	272	case __BLK_TA_REQUEUE:
d5396421	273	log_generic(pci, t, 'R');
d0ca268b JA	274	break;
d0ca268b JA	275	case __BLK_TA_ISSUE:
d5396421	276	ret = log_pc(pci, t, 'D');
d0ca268b JA	277	break;
d0ca268b JA	278	case __BLK_TA_COMPLETE:
d5396421	279	log_pc(pci, t, 'C');
d0ca268b JA	280	break;
	281	default:
	282	fprintf(stderr, "Bad pc action %x\n", t->action);
87b72777 JA	283	ret = 1;
87b72777 JA	284	break;
d0ca268b JA	285	}
d0ca268b JA	286
87b72777	287	return ret;
d0ca268b JA	288	}
d0ca268b JA	289
d5396421	290	static void dump_trace_fs(struct blk_io_trace t, struct per_cpu_info pci)
d0ca268b JA	291	{
	292	int w = t->action & BLK_TC_ACT(BLK_TC_WRITE);
	293
	294	switch (t->action & 0xffff) {
	295	case __BLK_TA_QUEUE:
d5396421 JA	296	account_q(pci, w, t->bytes);
d5396421 JA	297	log_queue(pci, t, 'Q');
d0ca268b JA	298	break;
d0ca268b JA	299	case __BLK_TA_BACKMERGE:
d5396421 JA	300	account_m(pci, w, t->bytes);
d5396421 JA	301	log_merge(pci, t, 'M');
d0ca268b JA	302	break;
d0ca268b JA	303	case __BLK_TA_FRONTMERGE:
d5396421 JA	304	account_m(pci, w, t->bytes);
d5396421 JA	305	log_merge(pci, t, 'F');
d0ca268b JA	306	break;
d0ca268b JA	307	case __BLK_TA_GETRQ:
d5396421	308	log_generic(pci, t, 'G');
d0ca268b JA	309	break;
d0ca268b JA	310	case __BLK_TA_SLEEPRQ:
d5396421	311	log_generic(pci, t, 'S');
d0ca268b JA	312	break;
d0ca268b JA	313	case __BLK_TA_REQUEUE:
d5396421 JA	314	account_c(pci, w, -t->bytes);
d5396421 JA	315	log_queue(pci, t, 'R');
d0ca268b JA	316	break;
d0ca268b JA	317	case __BLK_TA_ISSUE:
d5396421 JA	318	account_i(pci, w, t->bytes);
d5396421 JA	319	log_issue(pci, t, 'D');
d0ca268b JA	320	break;
d0ca268b JA	321	case __BLK_TA_COMPLETE:
d5396421 JA	322	account_c(pci, w, t->bytes);
d5396421 JA	323	log_complete(pci, t, 'C');
d0ca268b JA	324	break;
	325	default:
	326	fprintf(stderr, "Bad fs action %x\n", t->action);
1f79c4a0	327	break;
d0ca268b	328	}
d0ca268b JA	329	}
d0ca268b JA	330
d5396421	331	static int dump_trace(struct blk_io_trace t, struct per_cpu_info pci)
d0ca268b	332	{
87b72777 JA	333	int ret = 0;
87b72777 JA	334
33b56019 JA	335	if (output_name && !pci->ofp) {
	336	snprintf(pci->ofname, sizeof(pci->ofname) - 1,
	337	"%s_log.%d", output_name, pci->cpu);
	338
	339	pci->ofp = fopen(pci->ofname, "w");
	340	if (pci->ofp == NULL) {
	341	perror(pci->ofname);
	342	return 1;
	343	}
	344	}
	345
d0ca268b	346	if (t->action & BLK_TC_ACT(BLK_TC_PC))
d5396421	347	ret = dump_trace_pc(t, pci);
d0ca268b	348	else
d5396421	349	dump_trace_fs(t, pci);
87b72777 JA	350
	351	events++;
	352	return ret;
d0ca268b JA	353	}
d0ca268b JA	354
d5396421	355	static void dump_pci_stats(struct per_cpu_info *pci)
5c017e4b JA	356	{
5c017e4b JA	357	printf("\tReads:\n");
d5396421 JA	358	printf("\t\tQueued: %'8lu, %'8LuKiB\n", pci->qreads, pci->qread_kb);
	359	printf("\t\tDispatched %'8lu, %'8LuKiB\n", pci->ireads, pci->iread_kb);
	360	printf("\t\tCompleted: %'8lu, %'8LuKiB\n", pci->creads, pci->cread_kb);
	361	printf("\t\tMerges: %'8lu\n", pci->mreads);
5c017e4b JA	362
5c017e4b JA	363	printf("\tWrites:\n");
d5396421 JA	364	printf("\t\tQueued: %'8lu, %'8LuKiB\n", pci->qwrites,pci->qwrite_kb);
	365	printf("\t\tDispatched %'8lu, %'8LuKiB\n", pci->iwrites,pci->iwrite_kb);
	366	printf("\t\tCompleted: %'8lu, %'8LuKiB\n", pci->cwrites,pci->cwrite_kb);
	367	printf("\t\tMerges: %'8lu\n", pci->mwrites);
5c017e4b JA	368	}
5c017e4b JA	369
d5396421	370	static void show_stats(void)
d0ca268b	371	{
d5396421	372	struct per_cpu_info foo, *pci;
412819ce	373	int i, pci_events = 0;
5c017e4b JA	374
5c017e4b JA	375	memset(&foo, 0, sizeof(foo));
d0ca268b	376
412819ce	377	for (i = 0; i < MAX_CPUS; i++) {
d5396421	378	pci = &per_cpu_info[i];
5c017e4b	379
d5396421	380	if (!pci->nelems)
afd2d7ad	381	continue;
afd2d7ad	382
d5396421 JA	383	foo.qreads += pci->qreads;
	384	foo.qwrites += pci->qwrites;
	385	foo.creads += pci->creads;
	386	foo.cwrites += pci->cwrites;
	387	foo.mreads += pci->mreads;
	388	foo.mwrites += pci->mwrites;
	389	foo.qread_kb += pci->qread_kb;
	390	foo.qwrite_kb += pci->qwrite_kb;
	391	foo.cread_kb += pci->cread_kb;
	392	foo.cwrite_kb += pci->cwrite_kb;
5c017e4b JA	393
5c017e4b JA	394	printf("CPU%d:\n", i);
d5396421	395	dump_pci_stats(pci);
412819ce	396	pci_events++;
5c017e4b JA	397	}
5c017e4b JA	398
412819ce	399	if (pci_events > 1) {
5c017e4b	400	printf("Total:\n");
d5396421	401	dump_pci_stats(&foo);
5c017e4b	402	}
d0ca268b JA	403
d0ca268b JA	404	printf("Events: %'Lu\n", events);
d0ca268b JA	405	}
d0ca268b JA	406
3aabcd89	407	static inline int trace_rb_insert(struct trace *t)
8fc0abbc JA	408	{
	409	struct rb_node **p = &rb_root.rb_node;
	410	struct rb_node *parent = NULL;
	411	struct trace *__t;
	412
	413	while (*p) {
	414	parent = *p;
	415	__t = rb_entry(parent, struct trace, rb_node);
	416
	417	if (t->bit->sequence < __t->bit->sequence)
	418	p = &(*p)->rb_left;
	419	else if (t->bit->sequence > __t->bit->sequence)
	420	p = &(*p)->rb_right;
	421	else {
87b72777	422	fprintf(stderr, "sequence alias!\n");
8fc0abbc JA	423	return 1;
	424	}
	425	}
	426
	427	rb_link_node(&t->rb_node, parent, p);
	428	rb_insert_color(&t->rb_node, &rb_root);
	429	return 0;
	430	}
	431
412819ce	432	static int sort_entries(void *traces, unsigned long offset, int nr)
8fc0abbc	433	{
412819ce	434	struct per_cpu_info *pci;
8fc0abbc JA	435	struct blk_io_trace *bit;
	436	struct trace *t;
	437	void *start = traces;
	438	int nelems = 0;
	439
6fe4709e	440	while (traces - start <= offset - sizeof(*bit)) {
412819ce JA	441	if (!nr)
	442	break;
	443
8fc0abbc	444	bit = traces;
6fe4709e	445
8fc0abbc JA	446	t = malloc(sizeof(*t));
	447	t->bit = bit;
	448	memset(&t->rb_node, 0, sizeof(t->rb_node));
	449
6fe4709e JA	450	trace_to_cpu(bit);
6fe4709e JA	451
66fa7233 JA	452	if (verify_trace(bit))
	453	break;
	454
412819ce JA	455	pci = &per_cpu_info[bit->cpu];
412819ce JA	456
412819ce JA	457	pci->nelems++;
412819ce JA	458
8fc0abbc JA	459	if (trace_rb_insert(t))
	460	return -1;
	461
	462	traces += sizeof(*bit) + bit->pdu_len;
	463	nelems++;
412819ce	464	nr--;
6fe4709e	465	}
8fc0abbc JA	466
	467	return nelems;
	468	}
	469
412819ce JA	470	static void free_entries_rb(void)
	471	{
	472	struct rb_node *n;
	473
	474	while ((n = rb_first(&rb_root)) != NULL) {
	475	struct trace *t = rb_entry(n, struct trace, rb_node);
	476
	477	rb_erase(&t->rb_node, &rb_root);
	478	free(t);
	479	}
	480	}
	481
d5396421	482	static void show_entries_rb(void)
8fc0abbc	483	{
8fc0abbc	484	struct blk_io_trace *bit;
3aabcd89	485	struct rb_node *n;
8fc0abbc JA	486	struct trace *t;
	487	int cpu;
	488
3aabcd89 JA	489	n = rb_first(&rb_root);
	490	if (!n)
	491	return;
8fc0abbc	492
3aabcd89	493	do {
8fc0abbc JA	494	t = rb_entry(n, struct trace, rb_node);
	495	bit = t->bit;
	496
d5396421	497	cpu = bit->cpu;
87b72777	498	if (cpu > max_cpus) {
8fc0abbc	499	fprintf(stderr, "CPU number too large (%d)\n", cpu);
87b72777	500	break;
8fc0abbc JA	501	}
8fc0abbc JA	502
cfab07eb AB	503	if (genesis_time == 0)
	504	genesis_time = bit->time;
	505	bit->time -= genesis_time;
8fc0abbc	506
cfab07eb	507	check_time(bit);
8fc0abbc	508
d5396421	509	if (dump_trace(bit, &per_cpu_info[cpu]))
87b72777 JA	510	break;
87b72777 JA	511
8fc0abbc JA	512	} while ((n = rb_next(n)) != NULL);
	513	}
	514
1f79c4a0 JA	515	static int read_data(int fd, void *buffer, int bytes, int block)
	516	{
	517	int ret, bytes_left, fl;
	518	void *p;
	519
	520	fl = fcntl(fd, F_GETFL);
	521
	522	if (!block)
	523	fcntl(fd, F_SETFL, fl \| O_NONBLOCK);
	524	else
	525	fcntl(fd, F_SETFL, fl & ~O_NONBLOCK);
	526
	527	bytes_left = bytes;
	528	p = buffer;
	529	while (bytes_left > 0) {
	530	ret = read(fd, p, bytes_left);
	531	if (!ret)
	532	return 1;
	533	else if (ret < 0) {
	534	if (errno != EAGAIN)
	535	perror("read");
	536	return -1;
	537	} else {
	538	p += ret;
	539	bytes_left -= ret;
	540	}
	541	}
	542
	543	return 0;
	544	}
	545
d5396421	546	static int do_file(void)
d0ca268b	547	{
1f79c4a0	548	int i, ret, nfiles;
d0ca268b	549
1f79c4a0 JA	550	nfiles = 0;
	551	max_cpus = 0;
	552	for (i = 0; i < MAX_CPUS; i++, nfiles++, max_cpus++) {
d5396421	553	struct per_cpu_info *pci = &per_cpu_info[i];
87b72777 JA	554	struct stat st;
	555	void *tb;
	556
d5396421 JA	557	pci->cpu = i;
d5396421 JA	558	pci->ofp = NULL;
d0ca268b	559
d5396421 JA	560	snprintf(pci->fname, sizeof(pci->fname)-1,"%s_out.%d", dev, i);
d5396421 JA	561	if (stat(pci->fname, &st) < 0)
d0ca268b	562	break;
afd2d7ad	563	if (!st.st_size)
afd2d7ad	564	continue;
d0ca268b	565
d5396421	566	printf("Processing %s\n", pci->fname);
8fc0abbc	567
87b72777	568	tb = malloc(st.st_size);
8fc0abbc	569
d5396421 JA	570	pci->fd = open(pci->fname, O_RDONLY);
	571	if (pci->fd < 0) {
	572	perror(pci->fname);
3aabcd89	573	break;
d0ca268b	574	}
afd2d7ad	575
1f79c4a0	576	if (read_data(pci->fd, tb, st.st_size, 1))
3aabcd89	577	break;
d0ca268b	578
412819ce	579	ret = sort_entries(tb, st.st_size, ~0U);
8fc0abbc	580	if (ret == -1)
3aabcd89	581	break;
d0ca268b	582
d5396421	583	close(pci->fd);
d5396421 JA	584	printf("\t%2d %10s %15d\n", i, pci->fname, pci->nelems);
	585
	586	}
	587
	588	if (!nfiles) {
	589	fprintf(stderr, "No files found\n");
	590	return 1;
	591	}
	592
	593	show_entries_rb();
d5396421 JA	594	return 0;
	595	}
	596
412819ce	597	static void resize_buffer(void *buffer, long old_size)
d5396421	598	{
412819ce	599	long cur_size = *old_size;
d5396421 JA	600	void *ptr;
d5396421 JA	601
412819ce JA	602	old_size = 2;
	603	ptr = malloc(*old_size);
	604	memcpy(ptr, *buffer, cur_size);
	605	free(*buffer);
	606	*buffer = ptr;
	607	}
d5396421	608
412819ce JA	609	static int read_sort_events(int fd, void **buffer)
	610	{
	611	long offset, max_offset;
	612	int events;
d5396421	613
412819ce JA	614	max_offset = 128 * sizeof(struct blk_io_trace);
	615	*buffer = malloc(max_offset);
	616	events = 0;
	617	offset = 0;
d5396421	618
412819ce JA	619	do {
	620	struct blk_io_trace *t;
	621	int pdu_len;
d5396421	622
412819ce JA	623	if (max_offset - offset < sizeof(*t))
412819ce JA	624	resize_buffer(buffer, &max_offset);
d5396421	625
412819ce JA	626	if (read_data(fd, buffer + offset, sizeof(t), !events)) {
412819ce JA	627	if (events)
d5396421	628	break;
412819ce JA	629
	630	usleep(1000);
	631	continue;
d5396421 JA	632	}
d5396421 JA	633
412819ce JA	634	t = *buffer + offset;
412819ce JA	635	offset += sizeof(*t);
d5396421	636
412819ce	637	pdu_len = be16_to_cpu(t->pdu_len);
d5396421	638
412819ce JA	639	if (max_offset - offset < pdu_len)
412819ce JA	640	resize_buffer(buffer, &max_offset);
d5396421	641
412819ce JA	642	if (read_data(fd, *buffer + offset, pdu_len, 1))
412819ce JA	643	break;
d5396421	644
412819ce JA	645	offset += pdu_len;
	646	events++;
	647	} while (!is_done());
d5396421	648
412819ce JA	649	return events;
412819ce JA	650	}
d5396421	651
412819ce JA	652	static int do_stdin(void)
	653	{
	654	int fd;
	655	void *ptr;
d5396421	656
1f79c4a0	657	fd = dup(STDIN_FILENO);
412819ce JA	658	do {
412819ce JA	659	int events;
d5396421	660
412819ce JA	661	events = read_sort_events(fd, &ptr);
	662	if (!events)
	663	break;
	664
	665	sort_entries(ptr, ~0UL, events);
	666	show_entries_rb();
	667	free_entries_rb();
d5396421 JA	668	} while (1);
	669
	670	close(fd);
	671	free(ptr);
d5396421 JA	672	return 0;
d5396421 JA	673	}
d0ca268b	674
1f79c4a0	675	static void flush_output(void)
412819ce JA	676	{
	677	int i;
	678
	679	for (i = 0; i < MAX_CPUS; i++) {
	680	struct per_cpu_info *pci = &per_cpu_info[i];
	681
	682	if (pci->ofp) {
	683	fflush(pci->ofp);
	684	fclose(pci->ofp);
	685	pci->ofp = NULL;
	686	}
	687	}
	688	}
	689
1f79c4a0	690	static void handle_sigint(int sig)
412819ce JA	691	{
	692	done = 1;
	693	flush_output();
	694	}
	695
1f79c4a0 JA	696	static void usage(char *prog)
	697	{
	698	fprintf(stderr, "Usage: %s -i <name> [-o <output>]\n", prog);
	699	}
	700
d5396421 JA	701	int main(int argc, char *argv[])
d5396421 JA	702	{
412819ce	703	int c, ret;
d5396421 JA	704
	705	while ((c = getopt_long(argc, argv, S_OPTS, l_opts, NULL)) != -1) {
	706	switch (c) {
	707	case 'i':
	708	dev = strdup(optarg);
	709	break;
	710	case 'o':
	711	output_name = strdup(optarg);
	712	break;
	713	default:
1f79c4a0	714	usage(argv[0]);
d5396421 JA	715	return 1;
d5396421 JA	716	}
d0ca268b JA	717	}
d0ca268b JA	718
d5396421	719	if (!dev) {
1f79c4a0	720	usage(argv[0]);
d5396421 JA	721	return 1;
	722	}
	723
	724	memset(per_cpu_info, 0, sizeof(per_cpu_info));
412819ce JA	725	memset(&rb_root, 0, sizeof(rb_root));
	726
	727	signal(SIGINT, handle_sigint);
	728	signal(SIGHUP, handle_sigint);
	729	signal(SIGTERM, handle_sigint);
d5396421 JA	730
	731	if (!strcmp(dev, "-"))
	732	ret = do_stdin();
	733	else
	734	ret = do_file();
	735
412819ce JA	736	show_stats();
412819ce JA	737	flush_output();
d5396421	738	return ret;
d0ca268b	739	}